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(No Model.) 3 Sheets-Sheet 1,.

M. CASTELNAU. ORE GQNGENTRATOR.

No. 446,963. Patented Feb. 24,1891.

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(No Model.) 3 Sheets-Sheet 2. M. CASTELNAU. ORB GONGENTRATOR.

N0. 446,963. Patented Feb. 24,1891.

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(No Model.) 3 Sheets+Sheet v3.

' M. CASTIELNMJ'.v

ORE CONCEN'IRATORl Patented Feb. 24,1891.

*BV 21M@ UNITED STATES l ATENT Fries.

MARCELIN CASTELNAU, OF PARIS, FRANCE.

oRE-ooNCENTRA-roe.

SEECIFICATION forming part ofq Letters Patent No. 446,963, datedFebruary 24, 1891.

Application led April 10,1890. Serial No. 347,373- (No model.) Patentedin France August 6,13891N0Z0010161M1diu Belgium August14,1889,N0.87,877.

To all whom, it may concern:

Beit known that I, MARCELIN CASTELNAU, a citizen ofthe French Republic,residing at Paris, in said Republic, have invented a certain new anduseful Improvement in Orc- ()oncentrators, (for which I have obtainedLetters Patent in France under date of August 1889, No. 200,016, and inBelgium under date of August v14, 1889, No. S7,377,) of which thefollowing` is a specification.v

Myinvention relates to certain new and useful improvements in a class ofconcentrators or machines used for treating ores or other materials thecomponent parts of which are of different specific gravities, the objectof such machines being to separate the minerals from the earthy waste.

To clearly explain the nature of my invention, reference is made to theaccompanying drawings, in which- Figure 1 is a front elevation of myimproved machine with a part of the collecting-troughs in section, takenon line z z, Fig. 3. Fig. 2 is a sectional end view of same on the lineof Fig. 1. Fig. 3 isa plan view of the machine, showing thecollecting-troughs; and Figs. 4 and 5 are diagrammatic viewsillustrating the action of the machine.

The machine consists of a suitable framework 1, which carries rollers 2,which serve to support an endless traveling belt 3, of rubberor ofsheet-steel or other suitable material, which passes over drums 4 l ateach end of the machine. These drums are carried in bearings in theframe-work, the latter being so arranged that the drums are at an angleto the floorline, as are also the supporting-rollers 2 2, the resultbeing that the traveling belt is maintained at lthis angle in thedirection of its width, though it is parallel to the floor in thedirection of its length. The angle of the belt may be varied slightly tosuit any particular class of mineral by adjusting the bearings of theforward drum 4 in any convenient way, as by means of theadjusting-screws 25 25, by which the bearings Vare carried, one beingraised and the other lowered, as desired. Both drums may be adjusted inthe same way, it desired. The bearings are also adjustable endwise bymeans of the screws 2G 26, so that the belt may be tightened orloosened. The belt may be driven by any suitable means, as by the worm5, operated from a pulley 6, said worm driving a pinion 7 on the shaftof one of the drums 4, as shown in Fig. 2. A distributer 8 is placedover the belt at the forward end, and into this the ore or othermaterial is fed through a pipe 9 from a hopper 10, which is suppliedfrom a chute 10. The belt as it travels under the ymachine is supportedon rollers 2, carried in bearings Jhon either side of the frame-work.

A Water-main 11 is provided at some point above the machine, and fromthis are branch pipes 12, 13, and 14, each having regulatingvalves 15and terminating in T- shaped branches 16, 17, and 18, the former 16arranged to supply fine jets of water, as shown, being placed at theside of and parallel with the belt, but just above it. 'lhe latter 17and 1S are placed centrally of the belt and also above it. All ofthebranches are capable of being turned to different angles, so that theflow of= water may be straight across the belt or at an angle to same.The pipe 17 directs the main body of water onto the belt and is providedwith taps 19, by which the flow may be regulated. 'lhe pipe 1S has finejets similar to the pipe 16. A glitter or channel 2O is carried by theframe-work along the lower edge of the belt to collect the material fromthe latter. At the forward end of the machine pipes 21A communicate withthis gutter 20 and with a trough 22, placed on or in the floor in frontof the machine. About midway of the belt are similar pipes 21,communicating with a trough 22, and at the rear end of the belt arepipes 2lb, communicating with a trough 221. The trough 22 receives thewaste earthy material, as hereinafter explained, and passes to anyconvenient point. The trough 22 receives the next material from thebelt, consisting of the poorer quality of ore and metal, which isdeposited in the tanks 23, and the trough 22b receives the rich floatmetal, which is deposited in the tanks 24. Two of these tanks are shownfor each trough; but one only is used at a time, the other being closedby a sluice-valve or similar arrangement 27, so that it may be openedwhen the other is full and IOO ready to be cleared out, so as topreserve the continuous action of the machine.

'lhe operation ot the machine is besty illustrated by means ot' thediagrams, Figs. if and 5. The mineral falls from the distributor S ontothe belt, S, which is traveling in the direction ot the arrow, andfalls, say, upon the spot marked n in Fig. 4f, where it is met by thecurrent of water from the pipe 1U. It is therefore subjected to thefollowing movements: first, in the direction due to the speed of thebelt, and, second, in the direction y, due to the current of watercoming from the pipe lli. These two movements result in a movementtoward the lower edge of the sloping` belt in the direction ot' 5. If,therefore, there is received on the belt materia-l composed of grainsot' equal size, but of different specilie gravity, they will arrangethemselves on the belt in three diterent parabolic arcs y z, as shown inFig. 5. Those arcs are more or less open, according to the dcnsityof thematerial t'ormiugthe are af, said material consisting ot the rich floatmetal which is received into the trough The branch water-pipe ll, Figs.il and Il, enables a current of water to be turned upon the belt atthispoint., so as to wash off this material treat mixed ores containingdiltcrent metals of different specific gravities.

I do not confine myself to the exact arrange mentof machine or apparatusshown, as the details maybe modified in many ways; but

In an ore-eoncentrator, the combination, with the frame andlaterallyinelined endless` belt, of means for driving the belt, meansfor supplying ore thereto, and the water-main arranged above the beltand provided with adjustable T-shaped branches and valves for regulatingthe supplyot water to each branch, substantially as described.

In testimony whereof I have hereunto set my hand in the presence ot twosubscribing witnesses.

'itnesses:

E. Tir-1031MB, R. J. PREsToN.

